Bridge.



PATENTED JUNE 5, 1906.

A. F. CAMPBELL.

BRIDGE.

APPLIGATION FILED 1350.27, 1905.

3 SHEETS-SHEET l.

No. 822,581. PATENTED JUNE 5, 1906.

A. F. CAMPBELL.

BRIDGE.

APPLICATION FILED 13120.27, 1905.

3 SHEETS-SHEET 3.

UNITED STATES I PATENT OFFICE.

BRIDGE.

Specification of Letters Patent.

Patented June 5, 1906.

Application filed December 27, 1905. Serial No. 293,470.

0 all whom, it may concern:

Be it known that I, AARON F. CAMPBELL, a citizen of the United States, residing at Redfield, in the county of J eiierson and State My invention has relation to new and use- -ful improvements in bridges, and has for its object the production of a bridge of such construction as to facilitate its being lengthened or shortened as occasion necessitates, the component parts of said bridge being so assembled and secured together as to make it very strong and durable, and consequently practically free from any liability of breakage or derangement of its parts.

A further object of my invention is to provide a bridge which while primarily intended to be used where streams are to be crossed or chasms spanned may be used in some cases as a railroad-bridge by making the parts of material of suflicient strength and constructing the bridge with no incline.

With these ends in view my invention consists in the novel construction, combination, and arrangement of parts, as will be hereinafter described, and set forth in the specification and claims hereunto appended.

In the accompanying drawings, in which like parts are designated by like characters throughout the several views, Figure 1 is a side elevation of my bridge. Fig. 2 is a bottom plan view, and Fig. 3 a transverse sectional view out on the line X X of Fig. 1.

My invention is described as follows:

The numeral 1 represents my improved bridge, which has a central horizontal part 2 and outer oblique or slanting parts 3, said bridge being mounted on beams 2, one provided at each extremity. The central part 2 of my bridge partly consists of a central transverse beam 4, having secured to its upper face a series of longitudinal beams 5,.one located at the central part of said beam 4 and two near each end, said lon itudinal beams crossing said beam 4 at rig1t angles. Secured to the tops of said beams 5 are parallel beams 6, and secured to the tops of said parallel beams 6 in parallel apposition is a floor 7, consisting of a series of boards of any desired width or thickness, and secured to the under face perpendicular with and near the center of said flooring are two longitudinal beams 6. Slanting brace-beams 8 are secured at their lower beveled ends to the upper face of said central transverse beam 4 and slant inwardly until their inner faces come nearly to the center of upper straight portions 9 of slanting brace-beams 10, resting and secured at their lower ends in recesses 11, formed or cut in the tops of the outermost of said longitudinal beams 5. Said slanting beams 10 are secured together at their inner ends by means of plates 12 of suitable construction. Adjustably secured at their lower threaded ends by nuts 13 and washers 14 to the under face of said transverse beam 4 are vertical rods 15, said rods passing through perforations in said central beam 4 between the outer beams of said longitudinal beams 5 and parallel beams 6, through perforations in said flooring 7, half-circular recesses in the straight portions of said brace-beams 10, and throu h perforations in said plates 12, and provi ed each at its upper end with a thread, nut 15, and washer 16.

The outer slanting parts 3 of my improved bridge are each provided at any desired dis tance along their lengths with transverse beams 17. Secured at their lower ends to the upper faces of said supporting-beams 2 in any manner desirable are slanting beams or stringers 18, preferably siX in number, two of which are centrally located and two located near each of the ends of said beams 2.

The outermost of the outer beams of said slanting beams or stringers 18 extend inwardly over said transverse beams 17 and have their inner parts passin between the outer beams of said longitu inal beams 5. The innermost of the outer beams of said slanting beams or stringers 18 also extend over said transverse beams, but have the outer faces of their inner parts contiguous with the inner faces of the innermost of the outer beams of said longitudinal beams 5. The two centrally-located beams of said beams or stringers 18 have the inner faces of their inner ends contiguous with the outer faces of the centrallylocated beam of said longitudinal beams 5. Secured at their lower ends to the upper faces and near the outer ends of said transverse beams 17 and at right angles to said longitudinal beams or strin ers 18 are slanting bracebeams 21. Secured to the upper faces of said slanting brace-beams or stringers 18 are floorings 22, preferably consisting of a series of boards of any desired width or thickness, and secured to the upper faces of said floorings are oblique bars 23, which run in parallel apposition with said beams or stringers 18. Secured at their inner ends to the upper faces of said slantin brace-beams 10 and running outwardly an downwardly are railings 24, the outer ends of said railings being braced above and parallel with said bars 23 by two cylindrical blocks 25 and square or rectangu lar oblong blocks 26, said blocks forming right angles with said bars 23. Said slanting beams 21 are secured at their inner upper edges to the outer faces of said blocks 26. Said longitudinal beams 5 and stringers 18 are rigidly secured together at their outer and inner ends, respectively, by providin each of said beams with a perforation and employing transverse holding-rods 26.

To add greater strength to my improved bridge and insure against any liability of derangement of its parts, I employ four or more rectangular oblong steel bars 27, two of which are located near the central part of the central horizontal part 2 of my bridge and one at each of the extremities of said longitudinal beams 5. My improved bridge is also provided with a longitudinal rod 28.

My bridge may be lengthened or shortened by making the. lap of said stringers 18 less or greater. As the lap is lessened the said bars 27 are brought closer together. While said bridge has been described as composed of a central straight part and outer slanting parts, I do not confine myself to this specific construction, but claim the right to make my bridge with little or no incline, as occasion demands, and while said bridge is primarily intended for use where small streams are to be crossed or chasms spanned it may be used in some cases as a railroad-bridge by making its parts of material of suflicient strength and thebridge with no incline.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A bridge 1, made with a central horizontal part 2 and outer slanting parts 3; central transverse beam 4; longitudinal beams 5, secured at right angles with and to the upper face of said beam 4, one located at the central part of said beam, and two near each end; beams 6, secured parallel with and to the tops of said beams 5; floor 7, secured to the tops of said beams 6; longitudinal beams 6 secured to'the under face, perpendicular with and near the center of said flooring 7; brace-beams 8, secured at their lower ends to the upper face of said beam 4 and slanting inwardly; slanting brace-beams 10, secured at their lower ends in recesses 11, cut in the tops of the outermost of said longitudinal beams 5, and secured together at their inner ends by plates 12; vertical rods 15, threaded at both ends, provided near each end with a nut and washer and passing through perforations in said beam 4, between the outer beams of said longitudinal beams 5 and parallel beams 6, through perforations in said flooring 7 half-circular recesses in the straight portions 9 of said brace-beams 10, and perforations in said plates 12; transverse beams 17; stringers 18, six in number, secured at their lower ends to the upper faces of said supporting-beams 2, two secured near the centers of said transverse beams and two near each of the ends of said beams; slanting brace-beams 21 secured at their lower ends to the upper faces and near the ends of said transverse beams 17, and perpendicular to said stringers 18; floorings 22, secured to the upper faces of said slanting brace-beams; oblique bars 23, secured to the upper faces of said floorings 22'; railings 24; secured at their inner ends to the upper faces of said slanting brace-beams 10, and braced at their lower ends above and parallel with said bars 23 by cylindrical blocks 25 and rectangular oblong blocks 26; transverse holding-rods 26, securing said longitudinal beams 5 and slanting beams 18 together at their outer and inner ends, respectively; rectangular oblong steel bars 27, two secured in the central part 2 of my bridge and one at each extremity of the longitudinal beams 5 and longitudinal rods 28, said bridge being of such construction that it may be lengthened or shortened as oocasion necessitates with practically no difficulty or expense, substantially as shown and described and for the purposes set forth.

2. A bridge, having a middle part 2 and outer parts 3, said middle part having a central transverse beam 4 and said outer parts transverse beams 17; longitudinal beams 5, secured to the upper face of said beam 4; beams 6, secured to the tops of said beams 5; floor 7, secured to the tops of said beams 6; longitudinal beams 6 secured to the under face of said floor; brace-beams 8, secured at their lower ends to said beams 4; slanting brace-beams 10, secured at their lower ends to the tops of the outermost of said longitudinal beams 5 and secured together at their inner ends by plates 12; transverse supporting-beams 2, one located at each extremity of said bridge; stringers 18, secured to said beams 2 at their lower ends; slanting bracebeams 21, secured at their lower ends to said transverse beams 17; floorings 22 secured at right angles with and to the tops of said slanting brace-beams 18; oblique bars 23, secured to the tops of said floorings 22; railings 24, secured at their inner ends to said slanting brace-beams 10 and braced at their lower ends above said bars 23; transverse holdingtially as shown and described and for the purrods 26, securing said longitudinal beams 5 poses set forth. [0 and stringers 18 together at their outer and In testimony whereof I affix my signature inner ends, respectively, and steel bars 27, in presence of two subscribing Witnesses.

secured in the central part 2 of my bridge, AARON F. CAMPBELL. said bridge being of such construction as to Witnesses: enable its being used Where small streams are ANGUS F. McNEILL,

to be crossed or chasms spanned, substan- JAMES E. T. HoLIMAN. 

